Rim-fire cartridge.



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F. O. HOAGLAND.

RIM FIRE CARTRIDGE.

APPLICATION FILED JUNE 18. 1914.

Patented Aug. 18, 1914-,

WITNESSES A TTORNEV THE NORRIS PEIERb Co F'HOTOLITHO" WASHIN-GTON. n. c.

EXPLOSIVE DEVICES UNITED STATES PATENT OFFICE.

FRANK O. HOAGLAND, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO UNIONMETALLIC CARTRIDGE COMPANY, OF BRIDGEPORT, CONNECTICUT, A CORPORATION OFCON- NECTICUT.

RIM-FIRE CARTRIDGE.

Specification of Letters Patent.

Patented Aug. 18, 1914.

Application filed June 18, 1914. Serial N 0. 845,776.

To all whom it may concern Be it known that I, FRANK O. HOAGLAND, acitizen of the United States, residing at Bridgeport, county ofFairfield, State of Connecticut, have lnvented an Improvement in RimFire Cartridges, of which the following is a specification.

This invention has for its object to pro duce durable and reliable rimfire cartridges with drawn brass shells.

It is of course well understood that shells for rim fire cartridges areof the so-called folded type and are required to be provided with acircular cavity or recess in the head to receive the priming compound.Heretofore, so far as I am aware, mercuric priming compounds, that is,compounds containing more or less fulminate of mercur have been used inrim fire cartridges, an owing to the deteriorating efiect of fulminateof mercury on brass, it has been necessary to make the shells of nearlypure copper, as alloys of co er containing very small proportions ofother metals or impurities therein are liable to be injuriously affectedby the mercuric priming compounds in use. I am aware that attempts havebeen made to overcome this difliculty so as to save the difi'erence incost between brass and copper, by lining brass shells with copper, withshellac and with various other materials. These attempts have not beensuccessful, however, owing to the fact that the lining used would partlyfill the cavity or recess which should be wholly filled with the primingcompound, and the result has been defective cartridges.

I have discovered that by the use of a nonmercuric priming compound I amenabled to make shells for rim fire cartridges out of ordinary brass.Numerous experiments have demonstrated that with a non-mercuric primingcompound, thoroughly reliable and durable rim fire cartridges can beproduced having shells made from brass containing widely varyingproportions of zinc, for example, perfectly successful results areattained with alloys containing from approximately fifteen per cent. ofmm to approximately forty per cent. of zinc. Likewise it s whollyimmaterial, so far as the present invention is concerned, just whatpriming compound is used so long as it is absolutely IIOIIT'IHBI'CUIIC.For example, perfectly satisfactory results with rim fire cartridgeshaving brass shells can be produced by using in lieu of fulminate ofmercury in the priming compound certain sulfids, sulfo-cyanids, azids,and acetylids of metals, also phosphorus, nitro compounds, picrates andchlorates.

Briefi then, my invention consists in the broad i ea of providing rimfiire cartridges having shells made of brass, Without lining or internalcoating of any kind, and using in connection with said brass shells anonmercuric priming compound.

In the accompanying drawing forming a part of this specification, I haveillustrated, partly in section and partly in elevation, a rim firecartridge embodying my novel invention.

10 denotes the shell whichis made of an alloy of zinc and copper, theproportions of which may vary within the limits above stated. The headof the shell is provided with a circular cavity or recess 11 whichreceives the non-mercuric priming compound indicated by 12.

13 indicates the powder, and 14 the bullet.

Having thus described my invention I claim: 7

1. A rim fire cartridge comprising a shell made of brass and having inits head a circular recess, and a non-mercuric priming compound in saidrecess.

2. A rim fire cartridge comprising a bul let, powder. a shell madefrombrass and having a head provided with a circular recess and anon-mercuric priming compound in said recess.

In testimony whereof I aifix my signature "in presence of two witnesses.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patenta- Washington, D. 0.

